Lidar observations during dusty infrared Test-1.

Area of Science:

• Atmospheric optics
• Remote sensing technology
• Aerosol science

Background:

• Lidar (Light Detection and Ranging) systems are crucial for atmospheric research.
• Understanding aerosol transmission properties at different wavelengths is vital for remote sensing accuracy.
• Previous studies have explored lidar performance in various atmospheric conditions.

Purpose of the Study:

• To compare the transmission characteristics of ruby (0.7-micrometer) and CO2 (10.6-micrometer) lidar systems.
• To evaluate wavelength-dependent effects on lidar signals through dust and smoke aerosols.
• To assess lidar performance during the DUSTY IR Test-1 at White Sands Missile Range (WSMR).

Main Methods:

• Utilized ruby (0.7-micrometer) and CO2 (10.6-micrometer) lidar systems for simultaneous measurements.
• Generated controlled dust and smoke clouds using artillery, TNT explosions, and fire.
• Measured transmission through a 1 km path with a reference target for backscatter return.

Main Results:

• Transmission measurements were compared between the two lidar wavelengths.
• Dust and smoke clouds were introduced into the lidar path.
• Broad particle size distribution in WSMR dust showed negligible wavelength-dependent transmission effects.

Conclusions:

• The wavelength of lidar used had minimal impact on transmission through the generated dust clouds.
• Particle size distribution is a key factor influencing lidar signal attenuation.
• Further research may explore other aerosol types and lidar wavelengths.